As discussed in the previous paper, the angular size of the cavities in MS 0735.6+7421 is of the order of 1 arcmin; therefore instruments with angular resolution of the order of 10 arcsec like NIKA2 are well suited to resolve the SZ signal inside the cavities, and to distinguish it from the one coming from the rest of cluster. While NIKA2 can provide information at the frequencies of 150 and 260 GHz, a wider spectral coverage could be useful to better distinguish between a thermal and a non-thermal origin of the SZE; this can be done with instruments operating at 90 GHz, like Mustang-2 at the Green Bank Telescope (GBT) and Mistral at the Sardinia Radio Telescope (SRT), and at higher frequencies, like the planned space telescope Millimetron [1]}, with its planned angular resolution of a few arcsec and a spectral coverage until a few THz.
